$D^{\ast }D\pi$ and $B^{\ast }B\pi$ couplings from Dyson-Schwinger equations framework

Yin-Zhen Xu, Khépani Raya

Employing a unified Dyson-Schwinger/Bethe-Salpeter equations approach, we calculate the strong decay couplings $D^{\ast }D\pi$ and $B^{\ast }B\pi$ within the so-called impulse-approximation in…